This is my perpetual problem with any plugin that posts my blog posts to Facebook: I can not find any pattern but some will post to facebook 2-5 times in succession. It's to the point where people will unsubscribe to the facebook page because this is so annoying. It mostly happens on scheduled posts. As I said, it happened with OTHER plugins which is why I was trying this new one. Same problem.
I'm looking for insight as to where this problem is occurring, in wordpress or at the server level. I know it is not the plugin but perhaps you can tell me where the issue could be considering how the plugin works.